CN106745075B - The method and purposes of potassium chloride and sodium chloride are extracted in a kind of ash from secondary zinc oxide - Google Patents
The method and purposes of potassium chloride and sodium chloride are extracted in a kind of ash from secondary zinc oxide Download PDFInfo
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- CN106745075B CN106745075B CN201611025538.3A CN201611025538A CN106745075B CN 106745075 B CN106745075 B CN 106745075B CN 201611025538 A CN201611025538 A CN 201611025538A CN 106745075 B CN106745075 B CN 106745075B
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- chloride
- sodium chloride
- zinc oxide
- ash
- potassium
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- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 title claims abstract description 108
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 title claims abstract description 96
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical group [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 title claims abstract description 82
- 239000001103 potassium chloride Substances 0.000 title claims abstract description 54
- 235000011164 potassium chloride Nutrition 0.000 title claims abstract description 54
- 239000011780 sodium chloride Substances 0.000 title claims abstract description 54
- 239000011787 zinc oxide Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 29
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000002425 crystallisation Methods 0.000 claims abstract description 30
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000000926 separation method Methods 0.000 claims abstract description 28
- 239000002994 raw material Substances 0.000 claims abstract description 27
- 230000008025 crystallization Effects 0.000 claims abstract description 25
- 239000011701 zinc Substances 0.000 claims abstract description 25
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 22
- 229910001424 calcium ion Inorganic materials 0.000 claims abstract description 16
- 229910052700 potassium Inorganic materials 0.000 claims abstract description 16
- 239000011591 potassium Substances 0.000 claims abstract description 16
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 15
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000011575 calcium Substances 0.000 claims abstract description 15
- 229910001425 magnesium ion Inorganic materials 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000002699 waste material Substances 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims description 40
- 238000001704 evaporation Methods 0.000 claims description 37
- 239000007788 liquid Substances 0.000 claims description 33
- 230000008020 evaporation Effects 0.000 claims description 30
- 239000007787 solid Substances 0.000 claims description 27
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 24
- 239000000047 product Substances 0.000 claims description 24
- 239000012452 mother liquor Substances 0.000 claims description 23
- 238000003756 stirring Methods 0.000 claims description 22
- 238000004458 analytical method Methods 0.000 claims description 21
- 239000000706 filtrate Substances 0.000 claims description 20
- 239000010949 copper Substances 0.000 claims description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 15
- 229910052802 copper Inorganic materials 0.000 claims description 15
- 150000002500 ions Chemical class 0.000 claims description 14
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 12
- 239000012535 impurity Substances 0.000 claims description 11
- 238000000746 purification Methods 0.000 claims description 11
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 10
- 239000001110 calcium chloride Substances 0.000 claims description 10
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 8
- 229910001385 heavy metal Inorganic materials 0.000 claims description 8
- 238000002386 leaching Methods 0.000 claims description 8
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000001556 precipitation Methods 0.000 claims description 5
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 4
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 4
- 239000002244 precipitate Substances 0.000 claims description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 3
- WIKSRXFQIZQFEH-UHFFFAOYSA-N [Cu].[Pb] Chemical compound [Cu].[Pb] WIKSRXFQIZQFEH-UHFFFAOYSA-N 0.000 claims description 3
- 239000000460 chlorine Substances 0.000 claims description 3
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000008399 tap water Substances 0.000 claims description 3
- 235000020679 tap water Nutrition 0.000 claims description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 2
- 230000008859 change Effects 0.000 claims description 2
- 230000008021 deposition Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000011268 mixed slurry Substances 0.000 claims 1
- 239000003337 fertilizer Substances 0.000 abstract description 11
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 abstract description 10
- 229940072033 potash Drugs 0.000 abstract description 10
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 abstract description 10
- 235000015320 potassium carbonate Nutrition 0.000 abstract description 10
- 239000003795 chemical substances by application Substances 0.000 abstract description 7
- 238000002844 melting Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000010865 sewage Substances 0.000 abstract description 2
- 229910021645 metal ion Inorganic materials 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 239000002351 wastewater Substances 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 15
- 239000011133 lead Substances 0.000 description 14
- 239000000126 substance Substances 0.000 description 14
- 229910052799 carbon Inorganic materials 0.000 description 6
- 210000002966 serum Anatomy 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 241001131796 Botaurus stellaris Species 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- ONIOAEVPMYCHKX-UHFFFAOYSA-N carbonic acid;zinc Chemical compound [Zn].OC(O)=O ONIOAEVPMYCHKX-UHFFFAOYSA-N 0.000 description 1
- 150000001805 chlorine compounds Chemical group 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011499 joint compound Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000024121 nodulation Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000011667 zinc carbonate Substances 0.000 description 1
- 229910000010 zinc carbonate Inorganic materials 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 229960001763 zinc sulfate Drugs 0.000 description 1
- 229910000368 zinc sulfate Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/14—Purification
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D1/00—Fertilisers containing potassium
- C05D1/02—Manufacture from potassium chloride or sulfate or double or mixed salts thereof
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/18—Materials not provided for elsewhere for application to surfaces to minimize adherence of ice, mist or water thereto; Thawing or antifreeze materials for application to surfaces
Abstract
The invention discloses the method and purposes that potassium chloride and sodium chloride are extracted in a kind of ash from secondary zinc oxide, the treatment process of the secondary zinc oxide ash obtained especially suitable for rotary kiln, rotary hearth furnace etc. using steel plant's Zinc-Bearing Wastes as raw material；This method is separated the potassium in secondary zinc oxide ash with other soluble-salts with insoluble matter using water-washing method, the solution of acquisition will be dissolved in the metal ions such as zinc, the lead of water and the separation of part calcium and magnesium ion by concentration and removal process, potassium chloride is obtained by the separated mode of evaporative crystallization again and is used as potash fertilizer, sodium chloride is used for snow-melting agent；The present invention solves the sewage discharge problem during secondary zinc oxide ash high value added utilization, and technique waste water is used to prepare potassium chloride fertilizer, and processing technological flow is simple, efficient, has high environmental protection and economy benefit.
Description
Technical field
The present invention relates to the processing of chemical industry waste with utilizing technical field, and in particular to one kind extracts chlorine from secondary zinc oxide ash
Change the method and purposes of potassium and sodium chloride.
Background technology
Steel plant's Zinc-Bearing Wastes can seriously cause furnace nodulation, in sealing since zinc therein has blast fumance harm
Stick up, sinter, the consequence such as coke dusting increase, therefore iron and steel enterprise all takes one for the higher dedusting ash of Zn content and sludge
Fixed controlling measurement its return to sintering circuit and then enter blast furnace.Have back currently for the technique of the recycling of these dirt mud
Rotary kiln, rotary hearth furnace etc., these techniques isolate zinc therein from dedusting using steel plant's Zinc-Bearing Wastes as raw material by working process
Secondary zinc oxide ash is obtained in system, secondary zinc oxide ash is used as the raw material of production zinc ingot metal, nano zine oxide and zinc sulfate at present.
Due to, at the same time containing alkali metal such as potassium, sodium, these dirt being handled in rotary kiln, rotary hearth furnace etc. in steel plant's Zinc-Bearing Wastes
During mud, potassium, sodium in dirt mud are generally enriched with the form of villaumite, villiaumite together with secondary zinc oxide in dust pelletizing system.Root
According to the difference of raw material, potassium content is different in secondary zinc oxide ash, and generally more than 15%, high even up to more than 30% is (equivalent
Into K2O).He Yubo (CN103924091A), Ou Yangguang and Cao Mingfeng (CN104773751A) et al. proposed removing wherein
Fluorine, the method for chlorine plasma, but effective recycling mode is not proposed to the potassium in waste liquid.
And China is the serious deficient country of a potassium resource, the industrial storage level of potassium totally 4.99 has been verified in China at present
Hundred million tons of (equivalent K2O), the 2.495% of global potassium resource amount is accounted for.Most of potassium resource that China now exploits mainly is distributed across
The bittern potassium resource of Chaidamu Basin, Qinghai Province and Xinjiang Lop Nur, accounts for gross reserves more than 96%, and geographical location is relatively remote, hands over
Logical inconvenience.And potash fertilizer demand is concentrated mainly on the central and east, logistics cost becomes the restraining factors that China's potash fertilizer self-sufficiency uses.China
Own potassium resource is problematic in that in short-term deliverability and long-term guarantee degree, therefore utilizes various materials containing potassium especially
It is that the extraction potash fertilizer of material containing soluble potassium has important practical significance in China.
The content of the invention
It is an object of the invention to provide the method and purposes that potassium chloride and sodium chloride are extracted in a kind of ash from secondary zinc oxide,
To solve leaching waste liquid during secondary zinc oxide ash high value added utilization in the prior art discard it is deficient with the existing potassium resource in China
The problems such as weary.
The purpose of the present invention is achieved through the following technical solutions：
A kind of method that potassium chloride and sodium chloride are extracted in ash from secondary zinc oxide, comprises the following steps：
S1, raw material leach, filtering：Raw material secondary zinc oxide ash is proportionally mixed with water, stands to obtain separation of solid and liquid
Mixed serum, then filter to obtain leachate；
S2, impurity and purification：The leachate is sequentially added into zinc powder, calcium chloride and sodium carbonate, and is progressively settled out copper-lead
Precipitation, calcium fluoride precipitate, carbonate deposition, obtain the clarified solution of chloride containing potassium and sodium chloride respectively after separation of solid and liquid impurity and purification；
S3, evaporative crystallization：The clarified solution heating evaporation is concentrated, potassium chloride crystalline solid is crystallized to obtain after cooling, is filtered
Potassium chloride product and evaporation mother liquor, the evaporation mother liquor continue evaporative crystallization and obtain sodium chloride crystallized product.
Raw material secondary zinc oxide ash includes steel plant's Zinc-Bearing Wastes through containing described in rotary kiln, rotary hearth furnace processing separation in the S1
Zinc in zinc fume mud obtains, and KCE content is higher than 15wt% in the secondary zinc oxide ash, and sodium chloride content is the potassium chloride
The 1/3-1/2 of content；The water is water in tap water or industry, and water temperature is 30-50 DEG C, the matter of the secondary zinc oxide ash and water
Amount is than being 1:2-4,；The mixing time is 30-60min, and the time of repose is 1-3h.
The S2 impurity and purification, concrete technology include：Analysis detects leachate copper, lead heavy metal ion in the S1 first
Concentration, adds 1.1-1.2 times for being replaced the ion of copper and lead mole by chemical equation (3-1) and (3-2) and being calculated equivalent
Zinc powder, stirring is to the reaction was complete, and filter to get filtrate A after separation of solid and liquid copper-lead precipitation；
Analysis detects fluorinion concentration in the filtrate A, adds complete by chemical equation (3-3) and the fluorine ion
Full response mole calculates 1.1-1.2 times of calcium chloride of equivalent, and stirring is filtered to the reaction was complete after separation of solid and liquid calcium fluoride precipitate
Obtain liquor B；
Analysis detects zinc, calcium and magnesium ion concentration in the liquor B, add by chemical equation (3-4), (3-5) and
(3-6) calculates the sodium carbonate of equivalent with the reaction mole completely of the zinc, calcium and magnesium ion, and stirring is to the reaction was complete, separation of solid and liquid carbon
Filtered after hydrochlorate precipitation chloride containing potassium and sodium chloride clarified solution.
Cu2++ Zn=Zn2++Cu↓ (3-1)
Pb2++ Zn=Zn2++Pb↓ (3-2)
Ca2++2F-=CaF2↓ (3-3)
ZnCl2+Na2CO3=2NaCl+ZnCO3↓ (3-4)
CaCl2+Na2CO3=2NaCl+CaCO3↓ (3-5)
MgCl2+Na2CO3=2NaCl+MgCO3↓ (3-6)
Evaporating temperature in the S3 evaporative crystallizations is 85-95 DEG C, and evaporation capacity is chloride containing potassium and sodium chloride in the S2
Clarified solution volume 30%-40%.
The circulating leaching that mother liquor can be used for the S1 raw materials is evaporated in the S3；Evaporation mother liquor sodium chloride concentration is higher than
It can continue evaporative crystallization during 30wt% and obtain sodium chloride crystallized product.
The purposes of potassium chloride and sodium chloride is extracted in a kind of ash from secondary zinc oxide, the potassium chloride product is used for crops
Potash fertilizer, the sodium chloride product are used for snow-melting agent or other industrial uses.
The invention has the advantages that：
1st, the potassium chloride that the present invention is produced can reach technical grade product requirement.
2nd, the present invention can fully recycle the heavy metal element such as copper, lead, zinc in secondary zinc oxide ash.
3rd, the present invention solves the sewage discharge problem during secondary zinc oxide ash high value added utilization, makes full use of time oxidation
The soluble potassium being enriched with zinc gray, turns waste into wealth, and reduces the discharge of discarded object, mitigates environmental pressure, while produces domestic short
Scarce high quality Potassium Chloride Product, has high environmental protection and economy benefit.
4th, technological process is simple, efficient.
Brief description of the drawings
Fig. 1 is the process flow chart that potassium chloride and sodium chloride are extracted in a kind of ash from secondary zinc oxide of the present invention.
Embodiment
Following embodiments are used to illustrate the present invention, but are not limited to the scope of the present invention.
Embodiment 1
A kind of method that potassium chloride and sodium chloride are extracted in ash from secondary zinc oxide, comprises the following steps：
S1, raw material leach, filtering：With 30 DEG C of tap water it is 1 according to mass ratio by raw material secondary zinc oxide ash:2 mixing are stirred
30min is mixed, 1h is stood and obtains solid-to-liquid ratio as 1:2 mixed serum, filters to obtain leachate.
S2, impurity and purification：Leachate copper, lead concentration of heavy metal ion in analysis detection S1 first, add by chemical reaction
Equation (3-1) and (3-2) displacement ion of copper and lead mole calculate 1.1 times of zinc powder of equivalent, and stirring is to the reaction was complete, solid-liquid
Filter to get filtrate A after separation；
Fluorinion concentration in analysis detection filtrate A, adds and rubs by chemical equation (3-3) and fluorine ion reaction completely
You calculate 1.1 times of calcium chloride of equivalent, and stirring is to the reaction was complete, and filter to get filtrate B after separation of solid and liquid；
Zinc, calcium and magnesium ion concentration in analysis detection liquor B, add by chemical equation (3-4), (3-5) and (3-
6) sodium carbonate of equivalent is calculated with the reaction mole completely of zinc, calcium and magnesium ion, stirring is filtered to the reaction was complete after separation of solid and liquid
The clarified solution of chloride containing potassium and sodium chloride.
S3, evaporative crystallization：Clarified solution is heated to 85 DEG C, be concentrated by evaporation to evaporation capacity for clarified solution volume 30% after,
Crystallisation by cooling separates out potassium chloride crystalline solid, filters to obtain potassium chloride product and evaporation mother liquor, wherein, evaporation mother liquor can be used for S1 raw materials
Circulating leaching；Evaporative crystallization can also be continued when evaporating mother liquor sodium chloride concentration and being higher than 30wt% and obtain sodium chloride crystallization production
Thing；Gained potassium chloride product is used for the potash fertilizer of crops, and gained sodium chloride product is used for snow-melting agent or other industrial uses.
Embodiment 2
A kind of method that potassium chloride and sodium chloride are extracted in ash from secondary zinc oxide, comprises the following steps：
S1, raw material leach, filtering：According to mass ratio it is 1- by water in industry that raw material secondary zinc oxide ash is 30 DEG C with temperature
4 are mixed 60min, stand 3h and obtain the mixed serum that solid-to-liquid ratio is 1-4, then filter to obtain leachate.
S2, impurity and purification：Leachate copper, lead concentration of heavy metal ion in analysis detection S1 first, add by chemical reaction
Equation (3-1) and (3-2) displacement ion of copper and lead mole calculate 1.2 times of zinc powder of equivalent, and stirring is to the reaction was complete, solid-liquid
Filter to get filtrate A after separation；
Fluorinion concentration in analysis detection filtrate A, adds and rubs by chemical equation (3-3) and fluorine ion reaction completely
You calculate 1.2 times of calcium chloride of equivalent, and stirring is to the reaction was complete, and filter to get filtrate B after separation of solid and liquid；
Zinc, calcium and magnesium ion concentration in analysis detection liquor B, add by chemical equation (3-4), (3-5) and (3-
6) sodium carbonate of equivalent is calculated with the reaction mole completely of zinc, calcium and magnesium ion, stirring is filtered to the reaction was complete after separation of solid and liquid
The clarified solution of chloride containing potassium and sodium chloride.
S3, evaporative crystallization：Clarified solution is heated to 95 DEG C, be concentrated by evaporation to evaporation capacity for clarified solution volume 40% after,
Crystallisation by cooling separates out potassium chloride crystalline solid, filters to obtain potassium chloride product and evaporation mother liquor, wherein, evaporation mother liquor can be used for S1 raw materials
Circulating leaching；Evaporative crystallization can also be continued when evaporating mother liquor sodium chloride concentration and being higher than 30wt% and obtain sodium chloride crystallization production
Thing；Gained potassium chloride product is used for the potash fertilizer of crops, and gained sodium chloride product is used for snow-melting agent or other industrial uses.
Embodiment 3
A kind of method that potassium chloride and sodium chloride are extracted in ash from secondary zinc oxide, comprises the following steps：
S1, raw material leach, filtering：According to mass ratio it is 1- by water in industry that raw material secondary zinc oxide ash is 50 DEG C with temperature
3 are mixed 45min, stand 2h and obtain solid-to-liquid ratio as 1:3 mixed serum, then filters to obtain leachate.
S2, impurity and purification：Leachate copper, lead concentration of heavy metal ion in analysis detection S1 first, add by chemical reaction
Equation (3-1) and (3-2) displacement ion of copper and lead mole calculate 1.15 times of zinc powder of equivalent, and stirring is to the reaction was complete, solid-liquid
Filter to get filtrate A after separation；
Fluorinion concentration in analysis detection filtrate A, adds and rubs by chemical equation (3-3) and fluorine ion reaction completely
You calculate 1.15 times of calcium chloride of equivalent, and stirring is to the reaction was complete, and filter to get filtrate B after separation of solid and liquid；
Zinc, calcium and magnesium ion concentration in analysis detection liquor B, add by chemical equation (3-4), (3-5) and (3-
6) sodium carbonate of equivalent is calculated with the reaction mole completely of zinc, calcium and magnesium ion, stirring is filtered to the reaction was complete after separation of solid and liquid
The clarified solution of chloride containing potassium and sodium chloride.
S3, evaporative crystallization：Clarified solution is heated to 90 DEG C, be concentrated by evaporation to evaporation capacity for clarified solution volume 35% after,
Crystallisation by cooling separates out potassium chloride crystalline solid, filters to obtain potassium chloride product and evaporation mother liquor, wherein, evaporation mother liquor can be used for S1 raw materials
Circulating leaching；Evaporative crystallization can also be continued when evaporating mother liquor sodium chloride concentration and being higher than 30wt% and obtain sodium chloride crystallization production
Thing.
Gained potassium chloride product is used for the potash fertilizer of crops, and gained sodium chloride product is used for snow-melting agent or other are industrial
On the way.
Embodiment 4
A kind of method that potassium chloride and sodium chloride are extracted in ash from secondary zinc oxide, comprises the following steps：
S1, raw material leach, filtering：According to mass ratio it is 1- by water in industry that raw material secondary zinc oxide ash is 40 DEG C with temperature
3 are mixed 45min, stand 2h and obtain solid-to-liquid ratio as 1:3 mixed serum, then filters to obtain leachate.
S2, impurity and purification：Leachate copper, lead concentration of heavy metal ion in analysis detection S1 first, add by chemical reaction
Equation (3-1) and (3-2) displacement ion of copper and lead mole calculate 1.2 times of zinc powder of equivalent, and stirring is to the reaction was complete, solid-liquid
Filter to get filtrate A after separation；
Fluorinion concentration in analysis detection filtrate A, adds and rubs by chemical equation (3-3) and fluorine ion reaction completely
You calculate 1.2 times of calcium chloride of equivalent, and stirring is to the reaction was complete, and filter to get filtrate B after separation of solid and liquid；
Zinc, calcium and magnesium ion concentration in analysis detection liquor B, add by chemical equation (3-4), (3-5) and (3-
6) sodium carbonate of equivalent is calculated with the reaction mole completely of zinc, calcium and magnesium ion, stirring is filtered to the reaction was complete after separation of solid and liquid
The clarified solution of chloride containing potassium and sodium chloride.
S3, evaporative crystallization：Clarified solution is heated to 95 DEG C, be concentrated by evaporation to evaporation capacity for clarified solution volume 40% after,
Crystallisation by cooling separates out potassium chloride crystalline solid, filters to obtain potassium chloride product and evaporation mother liquor, wherein, evaporation mother liquor can be used for S1 raw materials
Circulating leaching；Evaporative crystallization can also be continued when evaporating mother liquor sodium chloride concentration and being higher than 30wt% and obtain sodium chloride crystallization production
Thing；Gained potassium chloride product is used for the potash fertilizer of crops, and gained sodium chloride product is used for snow-melting agent or other industrial uses.
Embodiment 5
A kind of method that potassium chloride and sodium chloride are extracted in ash from secondary zinc oxide, comprises the following steps：
S1, raw material leach, filtering：Raw material secondary zinc oxide ash is mixed with water in 40 DEG C of industry according to mass ratio for 1-2.5
Stirring 30min is closed, 2.5h is stood and obtains solid-to-liquid ratio as 1:2.5 mixed serum, then filters to obtain leachate.
S2, impurity and purification：Leachate copper, lead concentration of heavy metal ion in analysis detection S1 first, add by chemical reaction
Equation (3-1) and (3-2) displacement ion of copper and lead mole calculate 1.18 times of zinc powder of equivalent, and stirring is to the reaction was complete, solid-liquid
Filter to get filtrate A after separation；
Fluorinion concentration in analysis detection filtrate A, adds and rubs by chemical equation (3-3) and fluorine ion reaction completely
You calculate 1.15 times of calcium chloride of equivalent, and stirring is to the reaction was complete, and filter to get filtrate B after separation of solid and liquid；
Zinc, calcium and magnesium ion concentration in analysis detection liquor B, add by chemical equation (3-4), (3-5) and (3-
6) sodium carbonate of equivalent is calculated with the reaction mole completely of zinc, calcium and magnesium ion, stirring is filtered to the reaction was complete after separation of solid and liquid
The clarified solution of chloride containing potassium and sodium chloride.
S3, evaporative crystallization：Clarified solution is heated to 90 DEG C, be concentrated by evaporation to evaporation capacity for clarified solution volume 38% after,
Crystallisation by cooling separates out potassium chloride crystalline solid, filters to obtain potassium chloride product and evaporation mother liquor, wherein, evaporation mother liquor can be used for S1 raw materials
Circulating leaching；Evaporative crystallization can also be continued when evaporating mother liquor sodium chloride concentration and being higher than 30wt% and obtain sodium chloride crystallization production
Thing；Gained potassium chloride product is used for the potash fertilizer of crops, and gained sodium chloride product is used for snow-melting agent or other industrial uses.
Although above with general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention, belong to the scope of protection of present invention.
Claims (6)
1. the method for potassium chloride and sodium chloride is extracted in a kind of ash from secondary zinc oxide, it is characterised in that the described method includes following
Step：
S1, raw material leach, filtering：Raw material secondary zinc oxide ash is proportionally mixed with water, stand separation of solid and liquid is mixed
Slurries are closed, leachate is obtained after filtering；
S2, impurity and purification：The leachate is sequentially added into zinc powder, calcium chloride and sodium carbonate, and progressively precipitates and carries out successively
Separation of solid and liquid, obtains the clarified solution of chloride containing potassium and sodium chloride after impurity and purification；
S3, evaporative crystallization：The clarified solution heating evaporation is concentrated, crystallization precipitation potassium chloride crystalline solid, filters to obtain chlorine after cooling
Change potassium product and evaporation mother liquor, the evaporation mother liquor continues evaporative crystallization and obtains sodium chloride crystallized product；
Raw material secondary zinc oxide ash is included as described in steel plant's Zinc-Bearing Wastes through rotary kiln, rotary hearth furnace processing separation in the step S1
Obtained after zinc in Zinc-Bearing Wastes；
The step S2 impurity and purification, concrete technology include：Analysis detects leachate copper, lead heavy metal in the step S1 first
Ion concentration, adds 1.1-1.2 times of the zinc powder replaced the ion of copper and lead mole by chemical reaction and calculated equivalent, stirring is extremely
The reaction was complete, and filter to get filtrate A after separation of solid and liquid copper-lead precipitation；
Analysis detects fluorinion concentration in the filtrate A, adds the 1.1- that equivalent is calculated with fluorine ion reaction mole completely
1.2 times of calcium chloride, stirring is to the reaction was complete, and filter to get filtrate B after separation of solid and liquid calcium fluoride precipitate；
Analysis detects zinc, calcium and magnesium ion concentration in the liquor B, adds and the zinc, calcium and magnesium ion reaction mole meter completely
Calculate the sodium carbonate of equivalent, stirring to the reaction was complete, filtered after separation of solid and liquid carbonate deposition chloride containing potassium and sodium chloride it is clear
Clear liquid.
2. extracting the method for potassium chloride and sodium chloride in a kind of ash from secondary zinc oxide according to claim 1, its feature exists
In the mass ratio of the secondary zinc oxide ash and water is 1:2-4, the mixing time are 30-60min, and the time of repose is 1-
3h。
3. extracting the method for potassium chloride and sodium chloride in a kind of ash from secondary zinc oxide according to claim 1, its feature exists
In the water in the step S1 is water in tap water or industry, and water temperature is 30-50 DEG C.
4. extracting the method for potassium chloride and sodium chloride in a kind of ash from secondary zinc oxide according to claim 1, its feature exists
In the step S3 evaporating temperatures are 85-95 DEG C, and evaporation capacity is the clarified solution volume of chloride containing potassium and sodium chloride in the S2
30%-40%.
5. extracting the method for potassium chloride and sodium chloride in a kind of ash from secondary zinc oxide according to claim 1, its feature exists
In evaporation mother liquor is used for the circulating leaching of the step S1 raw materials in the step S3.
6. the method for potassium chloride and sodium chloride, its feature are extracted in a kind of ash from secondary zinc oxide according to claim 1 or 5
It is, is evaporated in the step S3 and continue evaporative crystallization acquisition sodium chloride crystallization production when mother liquor sodium chloride concentration is higher than 30wt%
Thing.
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| CN110627106A (en) * | 2019-08-22 | 2019-12-31 | 日照昆欧环保科技有限公司 | Method for producing zinc carbonate by using blast furnace cloth bag ash dechlorination wastewater |
| CN110724831A (en) * | 2019-10-31 | 2020-01-24 | 重庆赛迪热工环保工程技术有限公司 | Carbon circulating system and method for producing zinc oxide by industrially recycling zinc |
| CN111253180A (en) * | 2020-01-19 | 2020-06-09 | 重庆赛迪热工环保工程技术有限公司 | Method and system for preparing compound fertilizer and soda ash from fly ash |
| CN111375623A (en) * | 2020-03-10 | 2020-07-07 | 上海宝叶冶金技术有限公司 | Method for removing chlorine from fly ash |
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| CN103435073A (en) * | 2013-09-09 | 2013-12-11 | 北京科技大学 | Method for producing potassium chloride by using blast furnace dust of iron and steel enterprises |
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